绿皮苦瓜新品种冠春5号的选育     

李志  苗明军  杨亮  李跃建  肖平  常伟 《中国蔬菜》2017,1(12):66-68

冠春5号是以高代自交系327作母本,以自交系186作父本配制而成的苦瓜一代杂种。植株生长势旺盛,早熟,从播种至始收82 d(天)。主侧蔓均可结果,主蔓第1雌花节位为第7~8节。瓜长棒形,瓜长25~35 cm,横径5~7 cm,肉厚0.9~1.0 cm,单瓜质量420 g左右。果表皮浅绿色,点状突起与短条状突起相间瘤状物,尾部钝,果肉脆,苦味淡。早春栽培一般每667 m~2产量约3 000 kg,田间对白粉病和疫病的抗性优于对照新农村油绿苦瓜。适宜四川、重庆等地种植。  相似文献   

利用SCoT对甜菜种质资源的鉴定及遗传多样性分析     

朱尚明  吴则东  兴旺  邳植 《中国农学通报》2020,36(18):119-123

为了研究SCoT分子标记技术对甜菜种质资源鉴定的可行性。利用80条SCoT引物对48份甜菜种质资源进行鉴别,同时对种质资源进行了遗传多样性分析和亲缘关系的鉴定。结果表明,80条SCoT引物中有6条能够扩增出清晰、且多态性高的条带,分别为SCoT1、SCoT12、SCoT13、SCoT14、SCoT17和SCoT23,其中引物SCoT1、SCoT12、SCoT14和SCoT23单独使用均可鉴别全部的48份种质资源,引物SCoT13和SCoT17共同使用可以鉴别48个种质资源;聚类分析结果表明,在遗传距离0.15处,95.8%的种质资源均聚为一类,从分子角度上表明甜菜种质资源遗传距离较小。本研究为利用SCoT分子标记技术鉴别甜菜种质资源、对种质资源进行亲缘关系鉴定、杂交组合亲本选配以及分子标记辅助育种等提供相关科学依据。  相似文献   

质核互作型不育系阜CMS5A大豆的选育及应用     

李智 《现代农业科技》2015,(13)

阐述了质核互作型不育系阜CMS5A大豆的选育经过,总结了其特征特性,并分析了其应用成效,以供参考。  相似文献   

蚓粪对温室番茄植株叶片光合特性与产量的调节     

史津玮  王业迪  关之昊  姚澜  路迎奇  张玥琦  杨丽娟 《中国土壤与肥料》2020,(4):165-171

为了明确蚓粪施入对不同连作年限土壤栽培的番茄植株光合作用与产量的调节作用,试验以番茄为供试作物,采用温室内盆栽试验,研究番茄连作0、5和20年土壤中,蚓粪(VM)、鸡粪(CM)、稻草(FS)和化肥(CF),不施肥对照(CK)对番茄植株生长发育、生理特性以及产量的影响。结果表明,在番茄连作0年和5年的土壤中蚓粪处理番茄植株叶片光和参数略低于鸡粪处理,但高于其他处理。在连作20年的土壤中,蚓粪的输入使番茄植株叶片蒸腾速率、气孔导度、净光合速率和胞间CO_2浓度较鸡粪处理分别提高了13.70%、12.38%、6.51%和5.85%;较稻草处理分别提高了56.11%、33.21%、19.80%和16.50%;较化肥处理分别提高了84.05%、51.68%、20.89%和42.74%。除蚓粪和鸡粪处理外,其他处理在连作5年和连作20年的土壤中栽培的番茄的生物量、根系活力、产量均低于连作0年的对应处理。蚓粪处理的连作0年和5年的土壤中栽培的番茄产量分别为1 641和1 654 g·株~(-1),高于连作20年的番茄产量(1 593 g·株~(-1)),其生物量和根系活力也高于连作20年的土壤。生产上,可以通过适量输入蚓粪来调节植株的光合作用,提高生物量以及根系活力,从而提高番茄产量。  相似文献   

Neuroprotective effect of fasudil combined with bone marrow-derived neural stem cells on mice with experimental autoimmune encephalomyelitis     

SONG Guo-bin  XI Guo-ping  LI Yan-hua  LI Jia-shan  LIU Jian-chun  CHAI Zhi  XIAO Bao-guo  ZHANG Guang-xian  MA Cun-gen 《园艺学报》2017,33(12):2113-2120

AIM: To explore the neuroprotective effect of fasudil combined with bone marrow-derived neural stem cells (BM-NSCs) on the mice with experimental autoimmune encephalomyelitis (EAE). METHODS: Female C57BL/6 mice (8~10 weeks old, n=32) were immunized with myelin oligodendrocyte glycoprotein 35-55 (MOG_35-55) to establish chronic EAE model. The mice were randomly divided into control (ddH₂O) group, fasudil group, BM-NSCs group, and fasudil+BM-NSCs group. The clinical score and body weight were recorded every other day. The expression of neurotrophic factors was determined by immunofluorescence staining. RESULTS: In comparison with ddH₂O group, fasudil combined with BM-NSCs delayed onset and ameliorated severity of EAE. The numbers of brain-derived neurotrophic factor, glial cell-derived neurotrophic factor, nerve growth factor, neurotrophin-3 and ciliary neurotrophic factor positive cells in fasudil group, BM-NSCs group and fasudil+BM-NSCs group were all increased in various extents. In particularly, the expression of these neurotrophic factors in fasudil+BM-NSCs group was significantly higher than that in the mice treated with fasudil or BM-NSCs alone (P<0.01). CONCLUSION: Fasudil combined with BM-NSCs promotes the expression of neurotrophic factors and improves microenvironment of central nervous system, thus playing a positive role in neural restoration and regeneration through a synergistic and superimposed effect.  相似文献   

云南白雪茶研究现状及开发利用     

程挚 《安徽农业科学》2015,(11):289-290,294

云南白雪茶是滇西北高寒地区民间特有的一种长期使用的药物和保健饮品,具有茶文化特征.从云南民间的食用经验来看,白雪茶具有显著的清热、止咳、安神等保健作用,现代药理学研究又证明,白雪茶还具有抗炎、解热、抗疲劳、抗辐射、促进免疫等药理学活性.根据雪茶的研究现状对其植物学特性、化学成分、保健作用作了简要的阐述,为以后的开发利用提供了理论依据.  相似文献   

不同灌水下限及氮素形态配比对西兰花干物质分配、产量及品质的影响     

车旭升  吕剑  冯致  张国斌  秦启杰  张辉  金宁  李金武  罗建 《华北农学报》2020,35(5):149-158

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Identification and Molecular Characteristics Analysis of Porcine Epidemic Diarrhea Virus Variants     

ZHANG Zhi  CHENG Xiao-na  FAN Ya-ting  DONG Ya-qin  LIU Shuang  WU Fa-xing  SHAO Wei-xing  LI Xiao-cheng 《中国畜牧兽医》2015,42(7):1654-1660

To ascertain a diarrhea case in a pig farm in Shandong province,the pathological changes of dead piglets were observed and nested RT-PCR test was carried out on 7 diarrhea samples for porcine epidemic diarrhea virus (PEDV).Pathological examination revealed that intestine was detected as enlargement,hyperemia and edema.After histological examination,the typical microscopic lesions of intestine were disappearance of epithelial cells,villus shrinkage and shortening.The result of nested RT-PCR showed that all of the 7 samples could amplify a specific target band of PEDV.Molecular characteristics of two field strains showed that they had an amino acid homology of 92.3% to 92.4% with vaccine CV777 and 96.6% to 98.6% with other previous field strains which sequences were downloaded from GenBank.Phylogenetic tree analysis further revealed that all of PEDV strains could be mainly divided into two clusters of G1 and G2. G2 consisted of the field strains of our study and other field strains from USA,China and so on,which had the same sequence characteristics of two insertions and one deletion,while G1 consisted of all vaccines of CV777 and several older field strains from China and Korea.These results indicated that our field strains were the dominant strains in recent epidemic diarrhea occurrence.Moreover,its molecular characteristics might be a characterization of differentiating the field and vaccine strains.  相似文献   

Diel rhythms of sexual behavior and pheromone responses in Phauda flammans Walker (Lepidoptera: Zygaenidae)     

Xia‐Lin Zheng  Jun‐Yan Liu  Zhi‐Lin Zhang  Pan Wang  Wen Lu 《Pest management science》2019,75(11):3070-3075

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Characterization and Gene Mapping of a Lesion Mimic Mutant g303 in Rice     

LIU Lin  #  ZHANG Ying xin  #  LI Zhi  LIU Qun en  YU Ning  SUN Bin  YANG Zheng fu  ZHOU Quan  CHENG Shi hua  CAO Li yong 《中国水稻科学》2014,28(5):465

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